package org.smart4j.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * 反射工具类
 * User:wangkaijin
 * Date: 2017/7/19
 */

public final class ReflectionUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(ReflectionUtil.class);

    /**
     * 创建实例
     */
    public static Object newInstance(Class<?> cls){
        Object instance;
        try {
            instance = cls.newInstance();
        } catch (Exception e) {
            LOGGER.error("反射工具类:=========>创建实例出错",e);
            throw new RuntimeException(e);
        }
        return instance;
    }

    /**
     * 调用方法
     */
    public static Object invokeMethod(Object obj, Method method,Object... args){
        Object result=null;
        try {
            //开启java语言访问检查
            method.setAccessible(true);
            result = method.invoke(obj,args);
        } catch (Exception e) {
            LOGGER.error("反射工具类:=========>调用方法出错",e);
        }
        return result;
    }

    /**
     * 设置成员变量的值
     */
    public static void setField(Object obj,Field field,Object value){
        try {
            field.setAccessible(true);
            field.set(obj,value);
        } catch (Exception e) {
            LOGGER.error("反射工具类:=========>设置成员变量出错",e);
            throw new RuntimeException(e);
        }
    }
}
